diff --git a/components/REPL/REPLInput.tsx b/components/REPL/REPLInput.tsx
index 11b07c4..91a1f69 100644
--- a/components/REPL/REPLInput.tsx
+++ b/components/REPL/REPLInput.tsx
@@ -15,7 +15,8 @@ const REPLInput: NextPage<REPLInputParams> = ({historyCallback, inputRef}) => {
     const [justTabbed, setJustTabbed] = React.useState<number>(0);
 
     const replinOnChange = (e: React.FormEvent<HTMLInputElement>) => {
-        const currentInput = (e.target as HTMLInputElement).value;
+        const currentInput = (e.target as HTMLInputElement).value.toLowerCase();
+        (e.target as HTMLInputElement).value = currentInput;
         const suggest = commandCompletion(currentInput);
         setCurrentCmd(suggest);
         if (suggest.length === 0) suggest.push("");
diff --git a/next-env.d.ts b/next-env.d.ts
index 9bc3dd4..4f11a03 100644
--- a/next-env.d.ts
+++ b/next-env.d.ts
@@ -1,5 +1,4 @@
 /// <reference types="next" />
-/// <reference types="next/types/global" />
 /// <reference types="next/image-types/global" />
 
 // NOTE: This file should not be edited